Theoretical development and experimental verification of a DC-AC electronically rectified load-generator system model compatible with common network analysis software packages

Arkadan, A.A.; Hijazi, T.J.; Demerdash, Nabeel A. O.; Vaidya, J.; Maddali, V.K.

doi:10.1109/60.4212

Cited by 10 publications

(7 citation statements)

References 7 publications

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“…The functions are verified by the simulations. Since frequency domain steady state analysis of diodes are difficult due to their switching behaviour, simulation is preferable [14]. No analytic representation of the diodes is presented here, however, there are fast approximative methods for analysis of systems with diode rectifiers, such as averagevalue modelling [15], [16].…”

Section: Introductionmentioning

confidence: 99%

“…An interesting trend is that even if the electric ripple increase with increased electrical torque, the ripple on the turbine actually decreases. This is explained by equation (14), where the transfer of mechanical ripple decrease proportionally to Ω −2 g . The impact of dc-link capacitance and generator inductance is illustrated in Fig.…”

Section: A Simulated Parameter Studymentioning

confidence: 99%

“…The shape and size of the ripple is affected by additional impedances in the system. While the switching behaviour of the diodes are difficult to study analytically, the diodes are easy to simulate as electrical components [14].…”

Section: B Diode Rectificationmentioning

confidence: 99%

“…In the case of a salient rotor design with non constant impedance, the dqo frame can be used for generator modelling (not used in this paper). The process and how to connect the dqo-model to the diode model is carefully explained in [14]. The winding design and placement of the magnets add harmonics to the generated EMFs of the generator.…”

Section: Theory a Generator Modelmentioning

confidence: 99%

“…From measurements on generator terminal voltages and generator current, the electrical torque of the generator can be determined using equation (3). From the FFT of the high frequency electrical torque ripple, the mechanical torque ripple can be determined from equation (14) and rotational speed ripple of the generator rotor from equation (13).…”

Section: B Verification Of Analytical Solutionmentioning

confidence: 99%

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Mechanical Torque Ripple From a Passive Diode Rectifier in a 12 kW Vertical Axis Wind Turbine

Rossander

Goude

Eriksson

2017

IEEE Trans. Energy Convers.

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PostprintThis is the accepted version of a paper published in IEEE transactions on energy conversion. This paper has been peer-reviewed but does not include the final publisher proof-corrections or journal pagination.Citation for the original published paper (version of record):Rossander, M., Goude, A., Eriksson, S. (2017) Mechanical torque ripple from a passive diode rectifier in a 12 kW vertical axis wind turbine. Abstract-The influence of passive rectification on the mechanical torque of a permanent magnet generator for a directly driven vertical axis wind turbine has been studied. Passive diode rectification introduce electromagnetic torque ripple from the generator. The conversion of electromagnetic torque ripple into mechanical torque ripple and rotational speed ripple has been modelled, analytically evaluated and simulated. The simulations have been compared to measurements on an open site 12 kW prototype. A parameter study with the model illustrates the impact of shaft torsional spring constant, generator rotor inertia, generator inductance and dc-link capacitance. The results show that the shaft and generator rotor can be an effective filter of electromagnetic torque ripple from diode rectification. The measured mechanical torque ripple amplitude on the prototype is less than ±0.9% of nominal turbine torque. The measurements compare well with the simulations.

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Section: Introductionmentioning

confidence: 99%

Section: A Simulated Parameter Studymentioning

confidence: 99%

Section: B Diode Rectificationmentioning

confidence: 99%

Section: Theory a Generator Modelmentioning

confidence: 99%

Section: B Verification Of Analytical Solutionmentioning

confidence: 99%

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